Water pipe



FIG. 1 is a front perspective view of a water pipe, illustrating my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back facing view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line illustration of an environmental structure is not part of the design sought to be patented. 

An ornamental design for a water pipe, as shown and described. 